diff options
Diffstat (limited to 'src/mesa/main/glheader.h')
| -rw-r--r-- | src/mesa/main/glheader.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/mesa/main/glheader.h b/src/mesa/main/glheader.h index 0324b42ffd..596bd2d01e 100644 --- a/src/mesa/main/glheader.h +++ b/src/mesa/main/glheader.h @@ -1,4 +1,4 @@ -/* $Id: glheader.h,v 1.20 2001/05/14 23:11:12 brianp Exp $ */ +/* $Id: glheader.h,v 1.21 2001/06/15 15:22:07 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -241,5 +241,15 @@ typedef struct tagPIXELFORMATDESCRIPTOR PIXELFORMATDESCRIPTOR, *PPIXELFORMATDESC #endif +/* + * Sometimes we treat GLfloats as GLints. On x86 systems, moving a float + * as a int (thereby using integer registers instead of fp registers) is + * a performance win. Typically, this can be done with ordinary casts. + * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0) + * these casts generate warnings. + * The following union typedef is used to solve that. + */ +typedef union { GLfloat f; GLint i; } fi_type; + #endif /* GLHEADER_H */ |